DuckCorp Dico

Found one definition

1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   boxen
      /bok'sn/ (By analogy with VAXen) A fanciful plural of box
      often encountered in the phrase "Unix boxen", used to describe
      commodity Unix hardware.  The connotation is that any two
      Unix boxen are interchangeable.
      [Jargon File]
      (1994-11-29)